Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu do canh snippets" » "hieu so canh snippets", "hieu bo canh snippets", "bieu do canh snippets", "hieu doi canh snippets", "hieu do sanh snippets", "hieu do danh snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hieu do canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu do canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu do canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu do canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.